Subsoil attachment for plows.



W. F. HARTIG. SUBSOIL ATTACHMENT FOR PLOWS.

APPLICATION mum JAN.1B, 191a.

Patented Sept. 23, 1913.

WITNESSES IN VENTOR W COLUMBIA PLANOGRAPN cu, WASHINGTON, D. c.

WILLIAM F. HARTIG, OF EVANSVILLE, INDIANA.

SUBSOIL ATTACHMENT FOR FLOWS.

intense.

Specification of Letters Patent.

Patented Sept. 23, 191.3.

Original application filed August 27, 1912, Serial No. 717,301. Dividedand this application filed January To all whom it may concern:

Be it known that 1, *WILLIAM F. I'lAltlIG, a citizen of the UnitedStates, residing at l lvansville, in the county of Vanderburg and Stateof Indiana, have invented a new and useful Subsoil Attachment for Plows,of which the following is a specification.

The invention relates to a subsoil attach ment for plows, and is adivision of the subject-matter of an application for an adjustablesubsoil attachment for plows, filed by me Aug. 517, 1912, tierial No.717,301.

The object of the present invention is to improve the construction ofsubsoil attachments for plows, more especially the means for securingthe blade to the lower end of the standard of the subsoil attachment,and to provide a simple, eflicient and comparatively inexpensiveconstruction which will be strong and durable, and adapted to permit asubsoil blade to be easily and quickly applied to and removed from asubsoil standard and firmly and securely held in proper position thereonwhen secured thereto.

Nith these and other objects in view, the invention consists in theconstruction and novel combination of parts hereinafter fully described,illustrated in the accompanying drawing, and pointed out in the claimshereto appended; it being understood that various changes in the form,proportion, size and minor details of construction, within the scope ofthe claims, may be resorted to without departing from the spirit orsacrificing any of the advantages of the invention.

In the drawing:--I*igure 1 is a perspective View of the lower portion ofa standard and blade of a subsoil attachment con structed in accordancewith this invention. Fig. 2 is a vertical sectional view takenlongitudinally of the blade. Fig. 3 is a transverse sectional view.

Like numerals of reference designate corresponding parts in all thefigures of the drawing.

In the accompanying drawing in which is illustrated the preferredembodiment of the invention 1 designates a subsoil standard having adownwardly and forwardly curved foot portion 2 provided at its frontedge with an approximately rectangular or oblong notch 8 and having arecess 4 at its rear edge. The lower end of the standard 1 receives asubsoil blade 5 curved transversely Serial No. 742,946.

and having a tapered front portion and provided at a point intermediateof its ends with a slot 6 through which the lower end of the foot of thestandard extends. The front notch 3, which receives the front wall orportion of the subsoil blade at the front end of the slot 6, forms upperand lower shoulders for engaging the upper and lower faces of the blade5, and the said shoulders are adapted to hold the front portion of theblade 5 against upward and downward movement on the standard.

In order to facilitate the placing of the blade on the lower end of thestandard, the front recess is tapered slightly. the mouth or front endbeing approximately of a width equal to the thickness of the blade andthe bottom shoulder being inclined or angularly disposed and diverginginwardly or rcarwardly from the upper shoulder and also from the lowerface of the blade when the latter is in contact with the said uppershoulder. The rear recess l, which extends upwardly from the lower edgeof the foot, receives the rear wall or portion of the blade at the rearend of the slot 6 and it forms an upper shoulder, which holds the blade5 against upward movement. The blade 5 is secured in position againstthe rear shoulder by means of a transversely disposed wedge-shaped key 7curved to conform to the configuration of the blade and fitting againstthe inner face of the same and extending through a perforation S in thelower end of the foot of the standard. The wedge-shaped key, whichsupports the rear portion of the subsoil blade and holds the sameagainst downward movement, maintains the said head firmly in engagementwith the rear shoulder of the standard, and it is adapted to be readilyremoved to permit the subsoil blade to be detached from the standard.The heel portion 9 of the foot of the standard is rounded, as shown, topermit the foot of the standard to be readily inserted in the slot ofthe blade.

In assembling the parts, the front or too portion of the standard isintroduced into the slot of the subsoil blade and is moved forwardly toengage the front recess with the front wall of the slot, and the roundedheel portion of the standard and the tapered front recess permit theblade to be readily brought into proper position in contact with therear shoulder of the standard.

What is claimed is 1. A subsoil attachment for plows including astandard provided at its lower end with a front notch and having a rearrecess forming an upper shoulder,a subsoil blade provided with aslot'receiving the lower end of the standard, said blade fitting in thenotch and the recess of the'standard, and a fastening device piercingthe standard below the blade for retaining the latter in engagement withthe notch-and in contact with the said shoulder.

2. A subsoil attachment for plows including a standard provided at itslower end with an approximately. rectangular front notch, and having arear recess diametrically opposite the notch and forming an uppershoulder, a subsoil blade curved in cross section and provided with aslot intermediate its ends, said slot receiving the lower end of thestandard, saidblade having the walls of the slot engaging the notch andrecess of the standard, a perforation in said lower end of the standardbelow the blade, and a transverse wedge-shaped key curved to conform tothe configuration of the blade and extending through the perforation. V

3. A subsoil attachment for plows including a standard provided at itslower end with a tapered front notch and having a rear recess formingarheel, which is rounded at the bottom, a subsoil blade provided with aslot to receive the lower end of the standard and engaging the frontnotch thereof and fitting in the rearrecess, said' WILLIAM F. HARTIG.

Witnesses BEN H. TILLMAN, EDWARD G. HARTIG.

Copies of this patent may be obtained for five cents eaeh,-by addressingthe Commissioner of Patents,

' Washington, D. G.

